Evolution of core-shell structure induced by Yttrium in Nd-LaCe-Fe-B multi-main-phase magnets

被引：10

作者：

Fan, Sining ^{[1
,2
]}

Wang, Zhixiang ^{[2
]}

Jin, Zhehuan ^{[2
]}

Ding, Guangfei ^{[2
,3
]}

Fan, Xiaodong ^{[2
]}

Cao, Shuai ^{[2
]}

Guo, Shuai ^{[2
,3
]}

Zheng, Bo ^{[2
]}

Chen, Renjie ^{[2
,3
]}

Yan, Aru ^{[2
]}

Meng, Bin ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China

[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 896卷

关键词：

Nd-Fe-B magnets; High-abundance rare-earth element; Core-shell structure; Magnetic anisotropy; Microstructure; SINTERED MAGNETS; CE; CERIUM; PERFORMANCE; MICROSTRUCTURE; COERCIVITY; DEPENDENCE; FIELDS;

D O I：

10.1016/j.jallcom.2021.163127

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of Y and LaCe substitution in Nd-Fe-B multi-main-phase (MMP) magnets were investigated by co-mixing with the binary or ternary components. The microstructure and magnetic properties showed some differences after Y and LaCe-substitution. The coercivity was increased for the LaCe-substituted MMP magnets with two-types shell structures due to the stronger magnetic isolation between adjacent grains. Y substituted MMP magnets with one-type shell structure exhibited a relatively lower coercivity due to the deterioration of anisotropy owing to the La/Ce/Y enrichment in the core-shell structure. The La element preferred to migrate to the grain boundary regions in the LaCe-substituted MMP magnets, while it was trapped in the 2:14:1 shell by the inducement of Y in the Y-substituted MMP magnets. This work provides new insights into the fabrication of La/Ce/Y magnets with high performance. (c) 2021 Elsevier B.V. All rights reserved.

引用

页数：7

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